变论域模糊PID自整定控制器的设计及仿真

Design and simulation of variable universe fuzzy self-tuning PID controller

在一般模糊控制和PID控制的基础上,将模糊控制和PID控制技术相结合,研究了基于变论域的模糊PID控制原理,并利用MATLAB的SIMULINK以及模糊控制工具箱相结合的方法,实现了变论域模糊PID控制器与常规PID控制器的仿真比较.结果表明,设计的变论域模糊PID控制器,不仅保持了模糊控制器和PID控制器原来的优点,而且很好地解决了普通控制器的控制死区问题,提高了控制精度,缩短了响应时间,增强了实用性.

This paper introduces principle of fuzzy PID control with variable universe combining the present fuzzy control and PID control, and by using MATLAB/SIMULINK simulation and fuzzy control toolbox, variable universe fuzzy self-tuning PID controller is compared with routine PID controller. The simulation result shows that by using the improved fuzzy PID control with changing universe the control system not only holds advantages of the present fuzzy control and PID control, but also solves the die areas of the general controller, which improves control accuracy, reduces setting times and has the stronger practicability.